Deuteronomy 4:2 (NASB)
"You shall not add to the word which I am commanding you, nor take away from it, that you may keep the commandments of the LORD your God which I command you.
Revelation 22:19 (NIV)
19And if anyone takes words away from this book of prophecy, God will take away from him his share in the tree of life and in the holy city, which are described in this book.
Proverbs 12:22 (ESV)
Lying lips are an abomination to the Lord, but those who act faithfully are his delight.
Psalm 101:7 (NIV)
7No one who practices deceit will dwell in my house; no one who speaks falsely will stand in my presence.
Proverbs 6:16-19 (NIV)
16There are six things the Lord hates, seven that are detestable to him:
17haughty eyes, a lying tongue, hands that shed innocent blood,
18a heart that devises wicked schemes, feet that are quick to rush into evil,
19a false witness who pours out lies and a man who stirs up dissension among brothers.